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<ul><li>打标识：<code>&lt;h1 ref=&quot;xxx&quot;&gt;&lt;/h1&gt;</code>或<code>&lt;School ref=&quot;xxx&quot;&gt;&lt;/School&gt;</code></li> <li>获取：<code>this.$refs.xxx</code></li></ul></li></ul> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">v-text</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>msg<span class="token punctuation">&quot;</span></span> <span class="token attr-name">ref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>title<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">ref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>btn<span class="token punctuation">&quot;</span></span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>showDOM<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>点我输出上方的DOM元素<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>School</span> <span class="token attr-name">ref</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>sch<span class="token punctuation">&quot;</span></span><span class="token punctuation">/&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">import</span> School <span class="token keyword">from</span> <span class="token string">'./components/School'</span>

  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'App'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span><span class="token punctuation">{</span> School <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">msg</span><span class="token operator">:</span><span class="token string">'欢迎学习Vue！'</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
      <span class="token function">showDOM</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>$refs<span class="token punctuation">.</span>title<span class="token punctuation">)</span>	<span class="token comment">// 真实DOM元素</span>
        console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>$refs<span class="token punctuation">.</span>btn<span class="token punctuation">)</span>		<span class="token comment">// 真实DOM元素</span>
        console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>$refs<span class="token punctuation">.</span>sch<span class="token punctuation">)</span>		<span class="token comment">// School组件的实例对象（vc）</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br></div></div><h2 id="_3-3-props-配置项"><a href="#_3-3-props-配置项" class="header-anchor">#</a> 3.3. props 配置项</h2> <p><code>props</code>让组件接收外部传过来的数据</p> <ul><li>传递数据<code>&lt;Demo name=&quot;xxx&quot; :age=&quot;18&quot;/&gt;</code>这里age前加<code>:</code>，通过v-bind使得里面的18是数字</li> <li>接收数据
<ul><li>第一种方式（只接收）<code>props:['name', 'age']</code></li> <li>第二种方式（限制类型）<code>props:{name:String, age:Number}</code></li> <li>第三种方式（限制类型、限制必要性、指定默认值）</li></ul></li></ul> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token literal-property property">props</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">type</span><span class="token operator">:</span> String<span class="token punctuation">,</span>	 <span class="token comment">// 类型</span>
        <span class="token literal-property property">required</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span><span class="token comment">// 必要性</span>
        <span class="token keyword">default</span><span class="token operator">:</span> <span class="token string">'cess'</span><span class="token comment">// 默认值</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><p>PS：<strong>props是只读的</strong>，<code>Vue</code>底层会监测你对<code>props</code>的修改，如果进行了修改，就会发出警告，若业务需求确实需要修改，那么请复制<code>props</code>的内容到<code>data</code>中，然后去修改<code>data</code>中的数据</p> <p><code>src/App.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Student</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>李四<span class="token punctuation">&quot;</span></span> <span class="token attr-name">sex</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>女<span class="token punctuation">&quot;</span></span> <span class="token attr-name">:age</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>18<span class="token punctuation">&quot;</span></span><span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Student</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>王五<span class="token punctuation">&quot;</span></span> <span class="token attr-name">sex</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>男<span class="token punctuation">&quot;</span></span> <span class="token attr-name">:age</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>18<span class="token punctuation">&quot;</span></span><span class="token punctuation">/&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">import</span> Student <span class="token keyword">from</span> <span class="token string">'./components/Student'</span>

  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'App'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span><span class="token punctuation">{</span> Student <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br></div></div><p><code>src/components/Student.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span><span class="token punctuation">&gt;</span></span>{{ msg }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生姓名：{{ name }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生性别：{{ sex }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生年龄：{{ myAge + 1 }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>updateAge<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>尝试修改收到的年龄<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
<span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
  <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">&quot;Student&quot;</span><span class="token punctuation">,</span>
  <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">return</span> <span class="token punctuation">{</span>
      <span class="token literal-property property">msg</span><span class="token operator">:</span> <span class="token string">&quot;我是一个UESTC大学的学生&quot;</span><span class="token punctuation">,</span>
      <span class="token literal-property property">myAge</span><span class="token operator">:</span> <span class="token keyword">this</span><span class="token punctuation">.</span>age<span class="token punctuation">,</span>
    <span class="token punctuation">}</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span> <span class="token function">updateAge</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">this</span><span class="token punctuation">.</span>myAge<span class="token operator">++</span><span class="token punctuation">;</span> <span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token comment">// 简单声明接收</span>
  <span class="token comment">// props:['name','age','sex']</span>

  <span class="token comment">// 接收的同时对数据进行类型限制</span>
  <span class="token comment">//   props: {</span>
  <span class="token comment">//     name: String,</span>
  <span class="token comment">//     age: Number,</span>
  <span class="token comment">//     sex: String,</span>
  <span class="token comment">//   }</span>

  <span class="token comment">// 接收的同时对数据：进行类型限制+默认值的指定+必要性的限制</span>
  <span class="token literal-property property">props</span><span class="token operator">:</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token punctuation">{</span>
      <span class="token literal-property property">type</span><span class="token operator">:</span> String<span class="token punctuation">,</span> 	<span class="token comment">//name的类型是字符串</span>
      <span class="token literal-property property">required</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span> <span class="token comment">//name是必要的</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">age</span><span class="token operator">:</span> <span class="token punctuation">{</span>
      <span class="token literal-property property">type</span><span class="token operator">:</span> Number<span class="token punctuation">,</span>
      <span class="token keyword">default</span><span class="token operator">:</span> <span class="token number">99</span><span class="token punctuation">,</span> <span class="token comment">//默认值</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">sex</span><span class="token operator">:</span> <span class="token punctuation">{</span>
      <span class="token literal-property property">type</span><span class="token operator">:</span> String<span class="token punctuation">,</span>
      <span class="token literal-property property">required</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181313780.png" alt="image.png"></p> <h2 id="_3-4-mixin-混入"><a href="#_3-4-mixin-混入" class="header-anchor">#</a> 3.4. mixin 混入</h2> <ol><li>功能：可以把多个组件共用的配置提取成一个混入对象</li> <li>使用方式</li> <li>定义混入</li></ol> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token keyword">const</span> mixin <span class="token operator">=</span> <span class="token punctuation">{</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token operator">...</span><span class="token punctuation">.</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span><span class="token operator">...</span><span class="token punctuation">.</span><span class="token punctuation">}</span>
    <span class="token operator">...</span><span class="token punctuation">.</span>
<span class="token punctuation">}</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><ul><li>使用混入</li></ul> <ol><li>全局混入<code>Vue.mixin(xxx)</code></li> <li>局部混入<code>mixins:['xxx']</code></li></ol> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token keyword">var</span> mixin <span class="token operator">=</span> <span class="token punctuation">{</span>
	<span class="token function-variable function">data</span><span class="token operator">:</span> <span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
		<span class="token keyword">return</span> <span class="token punctuation">{</span>
    		<span class="token literal-property property">message</span><span class="token operator">:</span> <span class="token string">'hello'</span><span class="token punctuation">,</span>
            <span class="token literal-property property">foo</span><span class="token operator">:</span> <span class="token string">'abc'</span>
    	<span class="token punctuation">}</span>
  	<span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  	<span class="token literal-property property">mixins</span><span class="token operator">:</span> <span class="token punctuation">[</span>mixin<span class="token punctuation">]</span><span class="token punctuation">,</span>
  	<span class="token function">data</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    	<span class="token keyword">return</span> <span class="token punctuation">{</span>
      		<span class="token literal-property property">message</span><span class="token operator">:</span> <span class="token string">'goodbye'</span><span class="token punctuation">,</span>
            	<span class="token literal-property property">bar</span><span class="token operator">:</span> <span class="token string">'def'</span>
    	<span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
  	<span class="token function">created</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    	console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>$data<span class="token punctuation">)</span>
    	<span class="token comment">// =&gt; { message: &quot;goodbye&quot;, foo: &quot;abc&quot;, bar: &quot;def&quot; }</span>
  	<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br></div></div><p>同名生命周期钩子将合并为一个数组，因此都将被调用。另外，混入对象的钩子将在组件自身钩子之前调用</p> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token keyword">var</span> mixin <span class="token operator">=</span> <span class="token punctuation">{</span>
  	<span class="token function">created</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    	console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'混入对象的钩子被调用'</span><span class="token punctuation">)</span>
  	<span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  	<span class="token literal-property property">mixins</span><span class="token operator">:</span> <span class="token punctuation">[</span>mixin<span class="token punctuation">]</span><span class="token punctuation">,</span>
  	<span class="token function">created</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    	console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'组件钩子被调用'</span><span class="token punctuation">)</span>
  	<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>

<span class="token comment">// =&gt; &quot;混入对象的钩子被调用&quot;</span>
<span class="token comment">// =&gt; &quot;组件钩子被调用&quot;</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br></div></div><p><code>src/mixin.js</code></p> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token keyword">export</span> <span class="token keyword">const</span> hunhe <span class="token operator">=</span> <span class="token punctuation">{</span>
	<span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
		<span class="token function">showName</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
			<span class="token function">alert</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>name<span class="token punctuation">)</span>
		<span class="token punctuation">}</span>
	<span class="token punctuation">}</span><span class="token punctuation">,</span>
	<span class="token function">mounted</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
		console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'你好啊！'</span><span class="token punctuation">)</span>
	<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>

<span class="token keyword">export</span> <span class="token keyword">const</span> hunhe2 <span class="token operator">=</span> <span class="token punctuation">{</span>
	<span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
		<span class="token keyword">return</span> <span class="token punctuation">{</span>
			<span class="token literal-property property">x</span><span class="token operator">:</span><span class="token number">100</span><span class="token punctuation">,</span>
			<span class="token literal-property property">y</span><span class="token operator">:</span><span class="token number">200</span>
		<span class="token punctuation">}</span>
	<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>

</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br></div></div><p><code>src/components/School.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>showName<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>学校名称：{{name}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学校地址：{{address}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token comment">//引入一个hunhe</span>
  <span class="token keyword">import</span> <span class="token punctuation">{</span>hunhe<span class="token punctuation">,</span>hunhe2<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../mixin'</span>

  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'School'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'尚硅谷'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">address</span><span class="token operator">:</span><span class="token string">'北京'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">x</span><span class="token operator">:</span><span class="token number">666</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">mixins</span><span class="token operator">:</span><span class="token punctuation">[</span>hunhe<span class="token punctuation">,</span>hunhe2<span class="token punctuation">]</span>	<span class="token comment">// 局部混入</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br></div></div><p><code>src/components/Student.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>showName<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>学生姓名：{{name}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生性别：{{sex}}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">import</span> <span class="token punctuation">{</span>hunhe<span class="token punctuation">,</span>hunhe2<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../mixin'</span>

  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'Student'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'张三'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">sex</span><span class="token operator">:</span><span class="token string">'男'</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">mixins</span><span class="token operator">:</span><span class="token punctuation">[</span>hunhe<span class="token punctuation">,</span>hunhe2<span class="token punctuation">]</span>	<span class="token comment">// 局部混入</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br></div></div><p><code>src/App.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>School</span><span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>hr</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Student</span><span class="token punctuation">/&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">import</span> School <span class="token keyword">from</span> <span class="token string">'./components/School'</span>
  <span class="token keyword">import</span> Student <span class="token keyword">from</span> <span class="token string">'./components/Student'</span>

  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'App'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span><span class="token punctuation">{</span>School<span class="token punctuation">,</span>Student<span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br></div></div><p><code>src/main.js</code></p> <div class="language- line-numbers-mode"><pre class="language-text"><code>import Vue from 'vue'
import App from './App.vue'
// import {mixin} from './mixin'

Vue.config.productionTip = false
// Vue.mixin(hunhe)		// 全局混合引入
// Vue.mixin(hunhe2)	// 全局混合

new Vue({
    el:&quot;#app&quot;,
    render: h =&gt; h(App)
})
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181316707.png" alt="image.png"></p> <h2 id="_3-5-plugin-插件"><a href="#_3-5-plugin-插件" class="header-anchor">#</a> 3.5. plugin 插件</h2> <ol><li>功能：用于增强<code>Vue</code></li> <li>本质：包含<code>install</code>方法的一个对象，<code>install</code>的第一个参数是Vue，第二个以后的参数是插件使用者传递的数据</li> <li>定义插件（见下 src/plugin.js）</li> <li>使用插件：<code>Vue.use()</code></li></ol> <p><code>src/plugin.js</code></p> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
  <span class="token function">install</span><span class="token punctuation">(</span><span class="token parameter">Vue<span class="token punctuation">,</span>x<span class="token punctuation">,</span>y<span class="token punctuation">,</span>z</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span>y<span class="token punctuation">,</span>z<span class="token punctuation">)</span>
    <span class="token comment">//全局过滤器</span>
    Vue<span class="token punctuation">.</span><span class="token function">filter</span><span class="token punctuation">(</span><span class="token string">'mySlice'</span><span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token parameter">value</span><span class="token punctuation">)</span><span class="token punctuation">{</span><span class="token keyword">return</span> value<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span><span class="token number">4</span><span class="token punctuation">)</span><span class="token punctuation">}</span><span class="token punctuation">)</span>

    <span class="token comment">//定义全局指令</span>
    Vue<span class="token punctuation">.</span><span class="token function">directive</span><span class="token punctuation">(</span><span class="token string">'fbind'</span><span class="token punctuation">,</span><span class="token punctuation">{</span>
      <span class="token comment">//指令与元素成功绑定时（一上来）</span>
      <span class="token function">bind</span><span class="token punctuation">(</span><span class="token parameter">element<span class="token punctuation">,</span>binding</span><span class="token punctuation">)</span><span class="token punctuation">{</span>element<span class="token punctuation">.</span>value <span class="token operator">=</span> binding<span class="token punctuation">.</span>value<span class="token punctuation">}</span><span class="token punctuation">,</span>
      <span class="token comment">//指令所在元素被插入页面时</span>
      <span class="token function">inserted</span><span class="token punctuation">(</span><span class="token parameter">element<span class="token punctuation">,</span>binding</span><span class="token punctuation">)</span><span class="token punctuation">{</span>element<span class="token punctuation">.</span><span class="token function">focus</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
      <span class="token comment">//指令所在的模板被重新解析时</span>
      <span class="token function">update</span><span class="token punctuation">(</span><span class="token parameter">element<span class="token punctuation">,</span>binding</span><span class="token punctuation">)</span><span class="token punctuation">{</span>element<span class="token punctuation">.</span>value <span class="token operator">=</span> binding<span class="token punctuation">.</span>value<span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">)</span>

    <span class="token comment">//定义混入</span>
    Vue<span class="token punctuation">.</span><span class="token function">mixin</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
      <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token keyword">return</span> <span class="token punctuation">{</span><span class="token literal-property property">x</span><span class="token operator">:</span><span class="token number">100</span><span class="token punctuation">,</span><span class="token literal-property property">y</span><span class="token operator">:</span><span class="token number">200</span><span class="token punctuation">}</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token punctuation">}</span><span class="token punctuation">)</span>

    <span class="token comment">//给Vue原型上添加一个方法（vm和vc就都能用了）</span>
    <span class="token class-name">Vue</span><span class="token punctuation">.</span>prototype<span class="token punctuation">.</span><span class="token function-variable function">hello</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token operator">=&gt;</span><span class="token punctuation">{</span><span class="token function">alert</span><span class="token punctuation">(</span><span class="token string">'你好啊'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br></div></div><p><code>src/main.js</code></p> <div class="language-javascript line-numbers-mode"><pre class="language-javascript"><code><span class="token keyword">import</span> Vue <span class="token keyword">from</span> <span class="token string">'vue'</span>
<span class="token keyword">import</span> App <span class="token keyword">from</span> <span class="token string">'./App.vue'</span>
<span class="token keyword">import</span> plugins <span class="token keyword">from</span> <span class="token string">'./plugins'</span>	<span class="token comment">// 引入插件</span>

Vue<span class="token punctuation">.</span>config<span class="token punctuation">.</span>productionTip <span class="token operator">=</span> <span class="token boolean">false</span>

Vue<span class="token punctuation">.</span><span class="token function">use</span><span class="token punctuation">(</span>plugins<span class="token punctuation">,</span><span class="token number">1</span><span class="token punctuation">,</span><span class="token number">2</span><span class="token punctuation">,</span><span class="token number">3</span><span class="token punctuation">)</span>	<span class="token comment">// 应用（使用）插件</span>

<span class="token keyword">new</span> <span class="token class-name">Vue</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
	<span class="token literal-property property">el</span><span class="token operator">:</span><span class="token string">'#app'</span><span class="token punctuation">,</span>
	<span class="token function-variable function">render</span><span class="token operator">:</span> <span class="token parameter">h</span> <span class="token operator">=&gt;</span> <span class="token function">h</span><span class="token punctuation">(</span>App<span class="token punctuation">)</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br></div></div><p><code>src/components/School.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学校名称：{{ name | mySlice }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学校地址：{{ address }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>button</span> <span class="token attr-name">@click</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>test<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>点我测试一个hello方法<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>button</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'School'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'尚硅谷atguigu'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">address</span><span class="token operator">:</span><span class="token string">'北京'</span><span class="token punctuation">,</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token literal-property property">methods</span><span class="token operator">:</span> <span class="token punctuation">{</span>
      <span class="token function">test</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">hello</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br></div></div><p><code>src/components/Student.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生姓名：{{ name }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学生性别：{{ sex }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>text<span class="token punctuation">&quot;</span></span> <span class="token attr-name"><span class="token namespace">v-fbind:</span>value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>name<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'Student'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'张三'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">sex</span><span class="token operator">:</span><span class="token string">'男'</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181318620.png" alt="image.png"></p> <h2 id="_3-6-scoped样式"><a href="#_3-6-scoped样式" class="header-anchor">#</a> 3.6. scoped样式</h2> <ol><li>作用：让样式在局部生效，防止冲突</li> <li>写法：<code>&lt;style scoped&gt;</code></li></ol> <blockquote><p>Vue中的webpack并没有安装最新版，导致有些插件也不能默认安装最新版，如 npm i less-loader@7，而不是最新版</p></blockquote> <p><code>src/components/School.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>demo<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>title<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>学校名称：{{ name }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span><span class="token punctuation">&gt;</span></span>学校地址：{{ address }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'School'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span><span class="token string">'尚硅谷atguigu'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">address</span><span class="token operator">:</span><span class="token string">'北京'</span><span class="token punctuation">,</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span> <span class="token attr-name">scoped</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token selector">.demo</span><span class="token punctuation">{</span>
    <span class="token property">background-color</span><span class="token punctuation">:</span> skyblue<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br></div></div><p>​	<code>src/components/Student.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>demo<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>title<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>学生姓名：{{ name }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h2</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>atguigu<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>学生性别：{{ sex }}<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h2</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'Student'</span><span class="token punctuation">,</span>
    <span class="token function">data</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token punctuation">{</span>
        <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'张三'</span><span class="token punctuation">,</span>
        <span class="token literal-property property">sex</span><span class="token operator">:</span> <span class="token string">'男'</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span> <span class="token attr-name">lang</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>less<span class="token punctuation">&quot;</span></span> <span class="token attr-name">scoped</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token selector">.demo</span> <span class="token punctuation">{</span>
    <span class="token property">background-color</span><span class="token punctuation">:</span> pink<span class="token punctuation">;</span>
    <span class="token selector">.atguigu</span> <span class="token punctuation">{</span>
      <span class="token property">font-size</span><span class="token punctuation">:</span> 40px<span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br></div></div><p><code>src/App.vue</code></p> <div class="language-vue line-numbers-mode"><pre class="language-vue"><code><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>template</span><span class="token punctuation">&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>div</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>h1</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">&quot;</span>title<span class="token punctuation">&quot;</span></span><span class="token punctuation">&gt;</span></span>你好啊<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>h1</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>School</span><span class="token punctuation">/&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>Student</span><span class="token punctuation">/&gt;</span></span>
  <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>div</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>template</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>script</span><span class="token punctuation">&gt;</span></span><span class="token script"><span class="token language-javascript">
  <span class="token keyword">import</span> Student <span class="token keyword">from</span> <span class="token string">'./components/Student'</span>
  <span class="token keyword">import</span> School <span class="token keyword">from</span> <span class="token string">'./components/School'</span>

  <span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token punctuation">{</span>
    <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'App'</span><span class="token punctuation">,</span>
    <span class="token literal-property property">components</span><span class="token operator">:</span> <span class="token punctuation">{</span> School<span class="token punctuation">,</span> Student <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>script</span><span class="token punctuation">&gt;</span></span>

<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>style</span> <span class="token attr-name">scoped</span><span class="token punctuation">&gt;</span></span><span class="token style"><span class="token language-css">
  <span class="token selector">.title</span> <span class="token punctuation">{</span>
    <span class="token property">color</span><span class="token punctuation">:</span> red<span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
</span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>style</span><span class="token punctuation">&gt;</span></span>
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br></div></div><p><img src="https://hasakwebblogimg.oss-cn-hangzhou.aliyuncs.com/202303181319812.png" alt="image.png"></p></div></section> <footer class="page-edit"><!----> <!----></footer> <!----> <div class="comments-wrapper"><!----></div></main></div> <!----></div> <ul class="sub-sidebar sub-sidebar-wrapper" style="width:0;" data-v-b57cc07c data-v-7dd95ae2></ul></div></div></div><div class="global-ui"><div class="back-to-ceiling" style="right:1rem;bottom:6rem;width:2.5rem;height:2.5rem;border-radius:.25rem;line-height:2.5rem;display:none;" data-v-c6073ba8 data-v-c6073ba8><svg t="1574745035067" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5404" class="icon" data-v-c6073ba8><path d="M526.60727968 10.90185116a27.675 27.675 0 0 0-29.21455937 0c-131.36607665 82.28402758-218.69155461 228.01873535-218.69155402 394.07834331a462.20625001 462.20625001 0 0 0 5.36959153 69.94390903c1.00431239 6.55289093-0.34802892 13.13561351-3.76865779 18.80351572-32.63518765 54.11355614-51.75690182 118.55860487-51.7569018 187.94566865a371.06718723 371.06718723 0 0 0 11.50484808 91.98906777c6.53300375 25.50556257 41.68394495 28.14064038 52.69160883 4.22606766 17.37162448-37.73630017 42.14135425-72.50938081 72.80769204-103.21549295 2.18761121 3.04276886 4.15646224 6.24463696 6.40373557 9.22774369a1871.4375 1871.4375 0 0 0 140.04691725 5.34970492 1866.36093723 1866.36093723 0 0 0 140.04691723-5.34970492c2.24727335-2.98310674 4.21612437-6.18497483 6.3937923-9.2178004 30.66633723 30.70611158 55.4360664 65.4791928 72.80769147 103.21549355 11.00766384 23.91457269 46.15860503 21.27949489 52.69160879-4.22606768a371.15156223 371.15156223 0 0 0 11.514792-91.99901164c0-69.36717486-19.13165746-133.82216804-51.75690182-187.92578088-3.42062944-5.66790279-4.76302748-12.26056868-3.76865837-18.80351632a462.20625001 462.20625001 0 0 0 5.36959269-69.943909c-0.00994388-166.08943902-87.32547796-311.81420293-218.6915546-394.09823051zM605.93803103 357.87693858a93.93749974 93.93749974 0 1 1-187.89594924 6.1e-7 93.93749974 93.93749974 0 0 1 187.89594924-6.1e-7z" p-id="5405" data-v-c6073ba8></path><path d="M429.50777625 765.63860547C429.50777625 803.39355007 466.44236686 1000.39046097 512.00932183 1000.39046097c45.56695499 0 82.4922232-197.00623328 82.5015456-234.7518555 0-37.75494459-36.9345906-68.35043303-82.4922232-68.34111062-45.57627738-0.00932239-82.52019037 30.59548842-82.51086798 68.34111062z" p-id="5406" data-v-c6073ba8></path></svg></div></div></div>
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